Unit 3 Review Practice

A savings account balance can be modeled by the graph of the linear function shown on the grid. What is the rate of change of the balance with respect to the number of deposits?

• $100 per deposit

• $50 per deposit

• $0.50 per deposit

• $2 per deposit

What is the slope of the graph of $y=-\frac{1}{4}x+2$ ?

• 2

• -2

•  $\frac{1}{4}$  

•  $-\frac{1}{4}$  

A savings account balance can be modeled by the graph of the linear function shown on the grid. Which of the following best describes the y-intercept of the graph?

• The account increases $50 each deposit

• The account began with $450

• The account increases $100 each deposit

• The account began with $50

Which of the following can be used to model the function in the table?

•  $y=-\frac{8}{5}x+9$ 

•  $y=-\frac{8}{5}x+4.2$ 

•  $y=\frac{5}{8}x+9$ 

•  $y=\frac{5}{8}x+4.2$ 

What is the y-intercept of the graph?

• (0, 4)

• (4, 0)

• (0, 5.3)

• (5.3, 0)

What is the zero of the graph?

• 4

• -4

• 5.3

• 7

What is the slope of the line in the graph?

• $-\frac{3}{4}$

• $\frac{3}{4}$

• $\frac{7}{9}$

• $-\frac{7}{9}$

The graph of g is shown in the grid. What is the equation of g?

• $g\left(x\right)=-\frac{3}{4}x+4$

• $g\left(x\right)=\frac{3}{4}x+4$

• $g\left(x\right)=4x-\frac{3}{4}$

• $g\left(x\right)=4x+\frac{3}{4}$

A savings account balance can be modeled by the graph of the linear function shown on the grid. What equation can be used to model this function?

• $y=100x+50$

• $y=2x-50$

• $y=150x$

• $y=50x+100$

The graph models the percent remaining of a student's workout over time. Which of the following best describes the y-intercept?

• The student initially had 100 percent of her workout remaining

• The student initially had 50 percent of her workout remaining

• The student completed his workout after 50 minutes

• The student completed his workout after 100 minutes